Time Length

Warm Up

1. 1. carbon _
2. 2. carbonate _
3. 3. bicarbonate _ (aka hydrogen carbonate)
4. 4. aluminum _
5. 5. ammonium _
6. 6. phosphorus _
7. 7. phosphate _
8. 8. chlorine _
9. 9. hypochlorite _
10. 10. chlorite _
11. 11. chlorate _
12. 12. perchlorate _
13. 13. chromium _
14. 14. chromate _
15. 15. dichromate _
16. 16. nitrogen _
17. 17. nitrite _
18. 18. nitrate _
19. 19. sulfur _
20. 20. sulfite _
21. 21. sulfate _

Heat - Quiz at beginning of class on block 2 over heat.

• Review the Notes, then answer the questions below.

1. Calculate the number of Joules of heat needed to change 500 grams of water by 50 Celsius degrees. The specific heat of water is 4.184 J/g°C.
2. Josh heats a material with 35.9 J of heat to raise the temperature of 47.0 grams of a material by 2.5°C. What is the specific heat?
3. A 30-gram piece of iron is heated to 100°C and then dropped into cool water where the iron’s temperature drops to 30°C. How many Joules does it lose to the water? (The specific heat of iron is 0.45 J/g°C.)
4. What is the specific heat of a 50 gram piece of metal that will change from 20°C to 22°C when 5000 J of energy is absorbed.
5. How much energy was absorbed by the water in the swimming pool that contained 20000 grams of water which absorbed the sun’s energy to change in temp. from 13°C to 21°C? The specific heat of water is 4.184 J/g°C. =P
6. How much energy is released by 57.8 grams of liquid water to go from 78°C to 22°C? The specific heat of water is 4.184 J/g°C.
7. How much heat is needed to raise the temp of 5g of water from 0°C to 100°C? The specific heat of water is 4.184 J/g°C.
8. How much heat is needed to raise the temp of 500g of water from 0°C to 100°C? The specific heat of water is 4.184 J/g°C.
9. How much heat is needed to lower the temp of 500g of water from 100°C to 0°C? The specific heat of water is 4.184 J/g°C.
10. How much heat is needed to lower the temp of 500g of iron from 100°C to 0°C? The specific heat of iron is 0.45 J/g°C.
11. What is easier to cool, iron or water?